function fadeImage() {
    if (key) {
        $('#header_right').css("z-index",0);
        $('#header_right').css("background-image","url(" + $('#header_img').attr("src") + ")"); 
    }
    $('#header_img').css("display","none");
    key = ++key > $(header_images).length ? 1 : key;
    $('#header_img').attr("src",mainBaseUrl + "/media/header/"+ key + ".png");
}

$(document).ready(function () {
    fadeImage();
    $("#header_img").bind("load",function(){
        $('#header_img').fadeIn(1000).delay(1100);
        t = setTimeout('fadeImage()', 10000);
    })
    .each(function(){
        if(this.complete || (jQuery.browser.msie && parseInt(jQuery.browser.version) < 8))
            $(this).trigger("load");
    });
});